几种可溶性聚酰亚胺的合成与性能表征  

Synthesis and Characterization of Soluble Polyimides Derived from 5-(p-Tolyloxy)Benzene-1,3-Diamine

作　　者：任广元[1] 王春艳[1] 黄斌[1] 钱勇[1] 

机构地区：[1]东华理工大学材料科学与工程系,江西抚州344000

出　　处：《高分子材料科学与工程》2011年第6期26-29,共4页Polymer Materials Science & Engineering

基　　金：国防科委基础研究资助项目(A3420061167)

摘　　要：以3,5-二硝基溴苯与对甲基苯酚为原料,合成出中间产物3,5-二硝基-4′-甲基-二苯基醚,再用钯/碳还原得到芳香二胺单体3,5-二氨基-4′-甲基-二苯基醚,以此芳香二胺和四种不同芳香二酐为单体,通过低温聚合反应合成了高分子量的聚酰胺酸,热亚胺化的产物在极性强的溶剂中具有较好的溶解性。差示扫描量热(DSC)和热重法(TG)测试表明其玻璃化转变温度(Tg)介于200℃～211℃,在氮气气氛中5%,10%的热失重温度(T_d)分别在520℃,535℃以上。力学性能测试表明这些可溶性聚酰亚胺薄膜的拉伸强度,弹性模量分别能达到154.19 MPa,2.85 GPa。An aromatic diamine monomer, a series of new polyimides （PIs） were synthesized and the structures were characterized by Fourier transform infrared spectrum（FT-IR） , 1H nuclear magnetic resonance spectrum（1H- NMR） and elemental analysis. All the new polyimides were soluble in many solvents such as N-methylpyrrolidone （NMP）, N, N-dimethylformamide（DMF）, tetrahydrofuran and m-cresol. They have good thermal stability with the glass transition temperature of 200 ℃ -211 ℃, the temperature of 5% and 10% mass loss in nitrogen is in the range d 521 ℃ -549 ℃ and 534 ℃-558 ℃ respectively. All PIs were found to hold outstanding mechanical properties with the tensile strengths of 118.14 MPa-154.19 MPa and Young＇s modulus of 2.35 GPa-2.85 GPa.

关 键 词：聚酰亚胺 合成 热稳定性 力学性能 

分 类 号：TQ225.262[化学工程—有机化工]